Modern air pollution control for iron ore induration
Minerals & Metallurgical Processing
, 2014, Vol. 31, No. 2, pp. 103-114
The iron ore induration or pelletizing process emits particulates, sulfur dioxides (SOx), nitrogen oxides (NOx) and other pollutants depending on trace elements in the orebody and fuel. Typical emission levels for these compounds during induration will be outlined, and corresponding options for pollution control equipment described. Recent pellet plant construction in Sweden and the United States feature modern pollution controls – circulating fluidized beds for sulfur control, activated carbon for mercury control and electrostatic precipitators (ESPs) or baghouses for particulates. These controls will be described along with the rationale for selection. United States-specific environmental discharge issues such as sulfates in water and the relation to pollution control equipment design will be discussed.